android IP

 

参考前人研究成果，非个人创作1.使用WIFI首先设置用户权限<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission><uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission><uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>其次，代码如下public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                //获取wifi服务        WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);        //判断wifi是否开启        if (!wifiManager.isWifiEnabled()) {         wifiManager.setWifiEnabled(true);           }         WifiInfo wifiInfo = wifiManager.getConnectionInfo();              int ipAddress = wifiInfo.getIpAddress();          String ip = intToIp(ipAddress);          EditText et = (EditText)findViewById(R.id.EditText01);        et.setText(ip);    }        private String intToIp(int i) {                        return (i & 0xFF ) + "." +              ((i >> 8 ) & 0xFF) + "." +              ((i >> 16 ) & 0xFF) + "." +              ( i >> 24 & 0xFF) ;     }  2.使用GPRS首先，设置用户上网权限<uses-permission android:name="android.permission.INTERNET"></uses-permission>其次，代码如下public String getLocalIpAddress()     {         try         {             for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();)             {                NetworkInterface intf = en.nextElement();                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();)                {                    InetAddress inetAddress = enumIpAddr.nextElement();                    if (!inetAddress.isLoopbackAddress())                    {                        return inetAddress.getHostAddress().toString();                    }                }            }         }         catch (SocketException ex)         {             Log.e("WifiPreference IpAddress", ex.toString());         }         return null;     }